1 to 30

About 1–30

How many numbers

30

Chance of each

3.33%

Average draw

15.5

Primes in it

10

There are 30 numbers from 1 to 30, so each one has a 3.33% chance and the average draw settles at 15.5. 15 of them are even and 10 are prime — which is why a “random-looking” draw is no less likely than a round one.

Other ranges

Each one on its own page

• Dice roller

  One die or six, from d4 to d100, drawn as the solid it is.

• Coin flip

  Heads or tails, with a running tally of the flips so far.

• Random letter

  A letter of the alphabet — all of them, or only vowels.

The rest of the kit

• Name wheel

  Spin to pick a pupil. Nobody is picked twice until everyone has had a turn.

• Random groups

  Split the class into even groups in one click, by number of groups or by size.

• Classroom timer

  A countdown the back row can read, with a bar that turns amber, then red.

• Stopwatch

  Start, lap, stop. Laps with splits, fastest and slowest marked.

• Focus timer

  Work and break rounds that run by themselves, 25 and 5 or your own.